Acoustic telephone



V (No Model.)

J. K. STEBBINS.

ACOUSTIC TELEPHONE.

No. 268,746. Patented Dec. 5, 1882.

WITNESSES [NI/EVE io mv/ awn A, Ma,

% M M m v Afforney N. PETERS. PhotoLflhagmphzL \Vashmgtnn. n. c.

UNITED STATES PATENT OFFICE.

JAMES R. STEBBINS, OF ASHTABULA, OHIO.

ACOUSTIC TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 268,746, dated December5, 1882.

Applicationiilcd August 2!, I382. (Yo model.)

To all whom it may concern Be it known that 1, JAMES K. STEBEINs, ot'Ashtabula, in the county of Ashtabula and State of Ohio, have inventedcertain new and useful Improvements in Acoustic Telephones; and I dohereby declare the following to be a lull, clear, and exact descriptionoi the invention, such as will enable others skilled in the art to whichit pertains to make and use the same.

My invention relates to means for supporting the wires of acoustictelephones, the object being to provide a supporting device for thewires, whereby the sound current or vibrations are uninterrupted inturning corners or making bends of the line-wire.

A further object of the invention is to provide the wire-supportingdevices with means for allowing of the expansion and contraction of thewire without injury to the line, and for reducing the noise caused bythe wind.

In the drawings,Figure 1 represents my improved support and tensiondevice. Fig. 2 is a modification.

A represents a rod provided centrally and at each end with a loop, a,and slightly bent at its center, as shown. To each of the loops to issecured a loop, b, which serve as holders or guides for the line-wire Bof thetelephone. To each loop bis secured a guy-wire, O, the oppositeends of which are secured together to vibrate as a unit and terminate ina loop, 0, to which is secured one end of a cord, 1). The latter passesover a pulley, (l, suspended from any convenient point adjacent to theline, and is provided at its free end with a weight, E. By theconstruction of supporting-rod thus described, all sharp angles in theline-wire are avoided, and the latter approximates a curve at allturning-points, thus retaining the conducting property of the wire,since the sound will freely travel on a curve of the wire, but is muchweakened by an angle of the latter.

The tension device described enables the tension of the wire to beregulated as desired, to produce the best results.

In Fig. 2 I dispense with the pulley and attach a weighted cord, F,directly to the wire between two of the poles or supports, which enablesthe tension of the wire to be regulated.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination, with the line-wire, of a bent supportingrod, loopsfor receiving the line-wire, guy-cords, and a weight, substantially asset forth.

2. The combination,with the supporting-rod and loops for receiving theline-wire, of guycords, a pulley, and weighted cord, substautially asset forth.

In testimony whereof I have signed this specification in the presenceoftwo subscribing witnesses.

JAMES K. STEBBINS.

Witnesses:

E. W. RICHARDS, J. O. HUBBARD.

